I played with my wife, to quote her "It's kinda fun but kinda hard".
It was really hard to score a goal haha. Also sometimes my hammer would go deep in an object/ground and I couldn't move and had to lift it up out of the collider and then it connected with the ground again. Might feel more consistent if the hammer was never allowed to go through the environment. Keep it up, it's a fun idea! Online play might make it a hit!! Please check out my game when you have time :D